Question

a scientist found two cells. using a microscope, the scientist observed and documented key structures within each cell to learn more.

	cell a	cell b
membrane - bound organelles?	no	yes
example	bacteria	human cell

which three structures would be found in both cell a and cell b?

□ cytoplasm
□ cell wall
□ nucleus
□ ribosomes
□ plasma membrane (cell membrane)
□ mitochondria

Explanation:

Step1: Identify cell types

Cell A is a prokaryote (bacteria) and Cell B is a eukaryote (human cell).

Step2: Recall common structures

All cells have cytoplasm, ribosomes, and a plasma membrane. Prokaryotes lack a nucleus and membrane - bound organelles like mitochondria, and plant - like cell walls are not present in human cells or most bacteria in the context here.

Answer:

Cytoplasm, Ribosomes, Plasma membrane (cell membrane)